Incremental Sales [Formula, KPIs, and Best Practices]

How do you know your marketing or a sales promotion campaign was effective? How many more customers were you able to win?

While you might already be tracking campaign metrics, one method that can help you evaluate the effectiveness of a campaign and measure the success more objectively is incremental sales

This article describes the basics of incremental sales, the formula to measure it, KPIs, and the ROI you can expect. 

In this article:
>> Incremental Sales Formula
>> Incremental Sales Example
>> Measure Incremental Sales
>> Measure Incrementality
>> Best Practices to Improve Incremental Sales

What is incremental sales?

Incremental sales is a metric or KPI that gauges the efficacy of a marketing or sales promotion campaign. It calculates the difference between the sales you made during a promotion and the sales that you would have made if there was no promotion running during the same period.

Incremental sales formula


A simple formula to calculate incremental sales is: 

Incremental Sales = Total Sales – Baseline Sales

Here, two key terms are baseline sales and total sales. 

Baseline sales is the amount of revenue you would have generated without a promotion or a marketing campaign. It is an important metric in the incremental sales formula since it defines the status quo. Campaigns where incremental sales metric matters the most are seasonal offers like Black Friday sales, or when you test a new marketing channel, and want to assess its effectiveness.

Total sales is, of course, the overall sales you make for the specified period when the said campaign was live.

Incremental Sales Example


Let’s say a retailer expects to sell $50,000 worth of sports accessories in a month without advertising. 

The retailer launches an influencer campaign that costs $20,000 and sells $80,000 worth of items.

In this case, incremental sales will be $30,000:

Incremental sales = $80,000 – $50,000
= $30,000

Please note, incremental sales is different from the marketing ROI. Here, the goal is to evaluate the additional revenue generated from promotional campaigns. 

How to measure incremental sales


To accurately measure incremental sales, you must know your baseline sales. Then look at how many new customers you acquire during a campaign. You can look at up using your CRM solution.

Note that companies differ on what they consider as “new.” A customer can be new if they have never interacted with your brand before. Some brands consider them new if they have not made any purchase in the last six months or a year.

Some businesses enforce the single source rule. Suppose you have an affiliate marketing program. When the customer buys through the affiliate link, then only it will be counted as an incremental sale. 

A catch here is, the customer may be influenced to buy it via the affiliate program but does not use the link to make the purchase. So, even though the program led to the sale, the business will not consider it as an incremental sale.

The incrementality test is one way to gauge your sales performance. This test is similar to medical tests where one group gets the actual drug, whereas the control group gets a placebo. This test allows you to see which method performs better. The results can even help you tweak your marketing campaigns to be more effective and eventually drive up your sales.

How to measure incrementality


To measure incrementality, you must have a thorough understanding of the following metrics: 

First touch percentage: 

It is the percentage of revenue that a partner brings in by being the first point of contact of the customer. It could be an affiliate partner or a marketing campaign partner. The first-touch percentage allows you to understand how a partner indirectly drives the revenue even though they may not be the last touchpoint. An example of this could be influencer marketing. The customers see an influencer using the product or the service. Customers can then do further research and make the purchase separately.

Assisted revenue:

It is the revenue you won because of a partner, but the partner was not credited for it. Generally, partners are paid on the basis of the last-touch structure.

Participated revenue: 

It is the revenue you get from an affiliate where the affiliate partner interacted with the customer at some point during the sales process.

New customer percentage:

This metric is the best way to see the effectiveness of a marketing campaign or an affiliate program. However, this metric also heavily depends on how a brand defines its new customer. For instance, a loyal customer may be influenced to purchase because of a marketing campaign, but the brand may not consider that at all.

Quick conversion: 

The quick conversion rate lets you know when a lead makes a purchase in a few minutes after the last referral click. Brands generally prefer a longer conversion rate. A quick conversion often means that the customer is actively searching for a coupon code, and the business may lose money in that case. Say, for example, a customer wants to purchase a subscription for software. They go online and search for coupon codes for that software. They find the promo code from an affiliate link and make the purchase. The company can lose out money on that sale, and they also need to pay the affiliate partner a commission for that sale.

All these metrics help you understand incrementality, the factors that increase sales, and where you need to focus more. While the incremental sales metric gives you an overview of how effective a campaign was during a particular period, the other metrics listed above help you dig deep.

Why is it crucial to measure incremental sales?

It is obvious that the higher your incremental sales numbers are, the better your business is doing. It shows that your marketing campaigns are effective, your sales team is doing equally well, and you are efficiently converting leads into customers.

In contrast, if you’re not getting the desired ROI from your campaigns, you might want to backtrack some KPIs. 

The incremental sales KPIs will help you identify shortcomings and increase your profit margin by improving them. You may find that there are commissions you are paying for leads that you would have gotten anyway. These are expenses that you can eventually skip. Thus, you can increase your profit while making the same number of sales. 

When you accurately measure incremental sales, you will be wiser in your marketing spend. If you see that your marketing efforts are working, then you can increase your ad budget too. If your conversion rate is not improving, you can decrease your ad budget and focus more on sales efforts.

Also read:

Best Practices for Improving Incremental Sales


1. Find KPIs relevant to your business

Before you start measuring incremental sales, look at other KPIs that influence your incremental sales. Also, look at average purchase value, cost of goods sold, and more. While you cannot plug in these KPIs directly into the Incremental Sales KPI, it will give you an intuition of how you can improve your sales metrics.

2. Build better customer relationships

Improve your marketing collateral, target specific audience groups, and engage more with customers. It will give you a better overall experience with your marketing efforts.

3. Try out different channels

See which channels work better for your business. Different target audiences are reachable via various social media platforms. Look at related metrics to see which platforms offer a better return on investment.

4. Adapt Quickly

Customer behavior and social media trends can change in an instant. Therefore, your marketing efforts should adapt to these changes too. Be aware of the changes in marketing trends and consumer behavior. Do not shy away from trying a new marketing technique, as trial-and-error is the best way to form an effective strategy.

When you create a marketing strategy, test and analyze the results. Look at your incremental sales values and check other related metrics as well.

Wrap Up

While incremental sales give you a concrete idea of how well your marketing efforts are working, other numerous metrics will help you understand the various facets of your marketing and sales efforts.

If you want to keep a tab on your sales performance, campaigns, channels and gain better customer insights, you must consider a CRM. Take LeadSquared for a test spin and see how it takes your sales to the next level. Take a free trial now. 

Nidhi Agarwal

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